16ae032608
Currently TCP connections use a 1-bit selector, 'spliced', to determine the rest of the contents of the structure. We want to generalise the TCP connection table to other types of flows in other protocols. Make a start on this by replacing the tcp_conn_common structure with a new flow_common structure with an enum rather than a simple boolean indicating the type of flow. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
36 lines
813 B
C
36 lines
813 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Copyright Red Hat
|
|
* Author: David Gibson <david@gibson.dropbear.id.au>
|
|
*
|
|
* Tracking for logical "flows" of packets.
|
|
*/
|
|
#ifndef FLOW_H
|
|
#define FLOW_H
|
|
|
|
/**
|
|
* enum flow_type - Different types of packet flows we track
|
|
*/
|
|
enum flow_type {
|
|
/* Represents an invalid or unused flow */
|
|
FLOW_TYPE_NONE = 0,
|
|
/* A TCP connection between a socket and tap interface */
|
|
FLOW_TCP,
|
|
/* A TCP connection between a host socket and ns socket */
|
|
FLOW_TCP_SPLICE,
|
|
|
|
FLOW_NUM_TYPES,
|
|
};
|
|
|
|
extern const char *flow_type_str[];
|
|
#define FLOW_TYPE(f) \
|
|
((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
|
|
|
|
/**
|
|
* struct flow_common - Common fields for packet flows
|
|
* @type: Type of packet flow
|
|
*/
|
|
struct flow_common {
|
|
uint8_t type;
|
|
};
|
|
|
|
#endif /* FLOW_H */
|